Observation of ψ(3686)→η′e+e−

6533b853fe1ef96bd12ac30d

RESEARCH PRODUCT

Observation of ψ(3686)→η′e+e−

M. Ablikim M.n. Achasov S. Ahmed M. Albrecht M. Alekseev A. Amoroso F.f. An Q. An J.z. Bai Y. Bai O. Bakina R. Baldini Ferroli Y. Ban K. Begzsuren D.w. Bennett J.v. Bennett N. Berger M. Bertani D. Bettoni F. Bianchi E. Boger I. Boyko R.a. Briere H. Cai X. Cai O. Cakir A. Calcaterra G.f. Cao S.a. Cetin J. Chai J.f. Chang G. Chelkov G. Chen H.s. Chen J.c. Chen M.l. Chen P.l. Chen S.j. Chen X.r. Chen Y.b. Chen W. Cheng X.k. Chu G. Cibinetto F. Cossio H.l. Dai J.p. Dai A. Dbeyssi D. Dedovich Z.y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori Y. Ding C. Dong J. Dong L.y. Dong M.y. Dong Z.l. Dou S.x. Du P.f. Duan J. Fang S.s. Fang Y. Fang R. Farinelli L. Fava S. Fegan F. Feldbauer G. Felici C.q. Feng E. Fioravanti M. Fritsch C.d. Fu Q. Gao X.l. Gao Y. Gao Y.g. Gao Z. Gao B. Garillon I. Garzia A. Gilman K. Goetzen L. Gong W.x. Gong W. Gradl M. Greco M.h. Gu Y.t. Gu A.q. Guo R.p. Guo Y.p. Guo A. Guskov Z. Haddadi S. Han X.q. Hao F.a. Harris K.l. He X.q. He F.h. Heinsius T. Held Y.k. Heng T. Holtmann Z.l. Hou H.m. Hu J.f. Hu T. Hu Y. Hu G.s. Huang J.s. Huang X.t. Huang X.z. Huang Z.l. Huang T. Hussain W. Ikegami Andersson M. Irshad Q. Ji Q.p. Ji X.b. Ji X.l. Ji X.s. Jiang X.y. Jiang J.b. Jiao Z. Jiao D.p. Jin S. Jin Y. Jin T. Johansson A. Julin N. Kalantar-nayestanaki X.s. Kang M. Kavatsyuk B.c. Ke T. Khan A. Khoukaz P. Kiese R. Kiuchi R. Kliemt L. Koch O.b. Kolcu B. Kopf M. Kornicer M. Kuemmel M. Kuessner A. Kupsc M. Kurth W. Kühn J.s. Lange M. Lara P. Larin L. Lavezzi H. Leithoff C. Li Cheng Li D.m. Li F. Li F.y. Li G. Li H.b. Li H.j. Li J.c. Li J.w. Li Jin Li K.j. Li Kang Li Ke Li Lei Li P.l. Li P.r. Li Q.y. Li W.d. Li W.g. Li X.l. Li X.n. Li X.q. Li Z.b. Li H. Liang Y.f. Liang Y.t. Liang G.r. Liao L.z. Liao J. Libby C.x. Lin D.x. Lin B. Liu B.j. Liu C.x. Liu D. Liu D.y. Liu F.h. Liu Fang Liu Feng Liu H.b. Liu H.l. Liu H.m. Liu Huanhuan Liu Huihui Liu J.b. Liu J.y. Liu K. Liu K.y. Liu Ke Liu L.d. Liu Q. Liu S.b. Liu X. Liu Y.b. Liu Z.a. Liu Zhiqing Liu Y.f. Long X.c. Lou H.j. Lu J.g. Lu Y. Lu Y.p. Lu C.l. Luo M.x. Luo X.l. Luo S. Lusso X.r. Lyu F.c. Ma H.l. Ma L.l. Ma M.m. Ma Q.m. Ma T. Ma X.n. Ma X.y. Ma Y.m. Ma F.e. Maas M. Maggiora Q.a. Malik A. Mangoni Y.j. Mao Z.p. Mao S. Marcello Z.x. Meng J.g. Messchendorp G. Mezzadri J. Min R.e. Mitchell X.h. Mo Y.j. Mo C. Morales Morales N.yu. Muchnoi H. Muramatsu A. Mustafa Y. Nefedov F. Nerling I.b. Nikolaev Z. Ning S. Nisar S.l. Niu X.y. Niu S.l. Olsen Q. Ouyang S. Pacetti Y. Pan M. Papenbrock P. Patteri M. Pelizaeus J. Pellegrino H.p. Peng Z.y. Peng K. Peters J. Pettersson J.l. Ping R.g. Ping A. Pitka R. Poling V. Prasad H.r. Qi M. Qi T. .Y. Qi S. Qian C.f. Qiao N. Qin X.s. Qin Z.h. Qin J.f. Qiu K.h. Rashid C.f. Redmer M. Richter M. Ripka A. Rivetti M. Rolo G. Rong Ch. Rosner A. Sarantsev M. Savrié C. Schnier K. Schoenning W. Shan X.y. Shan M. Shao C.p. Shen P.x. Shen X.y. Shen H.y. Sheng X. Shi J.j. Song W.m. Song X.y. Song S. Sosio C. Sowa S. Spataro G.x. Sun J.f. Sun L. Sun S.s. Sun X.h. Sun Y.j. Sun Y.k. Sun Y.z. Sun Z.j. Sun Z.t. Sun Y.t. Tan C.j. Tang G.y. Tang X. Tang I. Tapan M. Tiemens B. Tsednee I. Uman G.s. Varner B. Wang B.l. Wang D. Wang D.y. Wang Dan Wang K. Wang L.l. Wang L.s. Wang M. Wang Meng Wang P. Wang P.l. Wang W.p. Wang X.f. Wang Y. Wang Y.f. Wang Y.q. Wang Z. Wang Z.g. Wang Z.y. Wang Zongyuan Wang T. Weber D.h. Wei P. Weidenkaff S.p. Wen U. Wiedner M. Wolke L.h. Wu L.j. Wu Z. Wu L. Xia Y. Xia D. Xiao Y.j. Xiao Z.j. Xiao Y.g. Xie Y.h. Xie X.a. Xiong Q.l. Xiu G.f. Xu J.j. Xu L. Xu Q.j. Xu Q.n. Xu X.p. Xu F. Yan L. Yan W.b. Yan W.c. Yan Y.h. Yan H.j. Yang H.x. Yang L. Yang Y.h. Yang Y.x. Yang Yifan Yang Z.q. Yang M. Ye M.h. Ye J.h. Yin Z.y. You B.x. Yu C.x. Yu J.s. Yu J.s. Yu C.z. Yuan Y. Yuan A. Yuncu A.a. Zafar Y. Zeng Z. Zeng B.x. Zhang B.y. Zhang C.c. Zhang D.h. Zhang H.h. Zhang H.y. Zhang J. Zhang J.l. Zhang J.q. Zhang J.w. Zhang J.y. Zhang J.z. Zhang K. Zhang L. Zhang T.j. Zhang X.y. Zhang Y. Zhang Y.h. Zhang Y.t. Zhang Yang Zhang Yao Zhang Yu Zhang Z.h. Zhang Z.p. Zhang Z.y. Zhang G. Zhao J.w. Zhao J.y. Zhao J.z. Zhao Lei Zhao Ling Zhao M.g. Zhao Q. Zhao S.j. Zhao T.c. Zhao Y.b. Zhao Z.g. Zhao A. Zhemchugov B. Zheng J.p. Zheng Y.h. Zheng B. Zhong L. Zhou Q. Zhou X. Zhou X.k. Zhou X.r. Zhou X.y. Zhou Xiaoyu Zhou Xu Zhou A.n. Zhu J. Zhu J. Zhu K. Zhu K.j. Zhu S. Zhu S.h. Zhu X.l. Zhu Y.c. Zhu Y.s. Zhu Z.a. Zhu J. Zhuang B.s. Zou J.h. Zou

subject

Dalitz decay Nuclear and High Energy Physics Meson Electron–positron annihilation BESIII; Charmonium; Dalitz decay; e+e− Annihilation; Nuclear and High Energy Physics e + e − Annihilation 01 natural sciences Omega NO law.invention BESIII; Charmonium; Dalitz decay; e+e−Annihilation; Nuclear and High Energy Physics Nuclear physics law 0103 physical sciences e+e−Annihilation 010306 general physics Collider Charmonium Physics 010308 nuclear & particles physics Generator (category theory)Branching fraction BESIII e+e− Annihilation Pseudoscalar BESIII; Charmonium; Dalitz decay; e + e − Annihilation ; Nuclear and High Energy Physics

description

Abstract Using a data sample of 448.1 × 10 6 ψ ( 3686 ) events collected with the BESIII detector at the BEPCII collider, we report the first observation of the electromagnetic Dalitz decay ψ ( 3686 ) → η ′ e + e − , with significances of 7.0σ and 6.3σ when reconstructing the η ′ meson via its decay modes η ′ → γ π + π − and η ′ → π + π − η ( η → γ γ ), respectively. The weighted average branching fraction is determined to be B ( ψ ( 3686 ) → η ′ e + e − ) = ( 1.90 ± 0.25 ± 0.11 ) × 10 − 6 , where the first uncertainty is statistical and the second systematic.

year	journal	country	edition	language
2018-08-01	Physics Letters B

https://doi.org/10.1016/j.physletb.2018.05.038